can i access resources or views of fragment inside its baseactivity

Question

I have a base activity in which i have inflated 4 fragments. i have several methods which i have to use in all the fragments.but i don't want that. I want to implement that method inside my base activity so that i can reuse my method to all the fragments. I want to use onTouchListener event of every parent layout of fragments. i can achieve this via xml onClick method and can call this method in baseActivity, But i want to use onTouch event, that method does't avalilable in layout xml. So i simply want to access resource from my fragment layout in my base activity and implement TouchEvent in baseActivity.

Is it Possible.?? Any help is Appreciated..Thanks!

Answer 1

You could use getView()

Approach 1

Before calling getView you must be sure that your fragment's onCreateView method was executed (for example, you could attach a OnPageChangeListener to your viewpager, and inside the onPageSelected, you attach the OnTouchListener)

viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

        }

        @Override
        public void onPageSelected(int position) {
            fragments.get(position).getView().setOnTouchListener(new View.OnTouchListener() {
                @Override
                public boolean onTouch(View view, MotionEvent motionEvent) {
                    return false;
                }
            });
        }

        @Override
        public void onPageScrollStateChanged(int state) {

        }
    });

Approach 2

Create a base fragment with a setOnTouchListener method:

public class TouchableFragment extends Fragment {

    protected View.OnTouchListener mOnTouchListener;

    public void setOnTouchListener(View.OnTouchListener mOnTouchListener) {
        this.mOnTouchListener = mOnTouchListener;
    }
}

Inside your fragment's onCreateView method:

public class MyFragment extends TouchableFragment {
    public View onCreateView(LayoutInflater inflater,
                         ViewGroup container, Bundle s) {

        mView = inflater.inflate(
                R.layout.a_layout
                container,
                false
        );

        if(this.mOnTouchListener != null){
            mView.setOnTouchListener(this.mOnTouchListener);
        }

        return mView;
    }
}

And inside your activity:

MyFragment myFragment = new MyFragment();
myFragment.setOnTouchListener(new View.OnTouchListener() {
    @Override
    public boolean onTouch(View view, MotionEvent motionEvent) {
        return false;
    }
});